Abstract
We evaluate the contributions of final-state light-by-light scattering to the parapositronium and orthopositronium decay rates. Our results are 1.29392(4) for parapositronium and 0.350(4) for orthopositronium in units of times the respective lowest-order rates.
- Received 21 September 2000
DOI:https://doi.org/10.1103/PhysRevA.63.032511
©2001 American Physical Society